Grafmüller, et al (2024) Granulation compared to co-application of biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More plus mineral fertilizer and its impacts on crop growth and nutrient leachingLeaching is the process where nutrients are dissolved and carried away from the soil by water. This can lead to nutrient depletion and environmental pollution. Biochar can help reduce leaching by improving nutrient retention in the soil.   More. Scientific Reports. https://doi.org/10.1038/s41598-024-66992-0

Biochar is increasingly being integrated into agricultural practices to boost crop yields, enhance soil resilience, and create carbon sinks. However, the application of biochar is hindered by its poor flowability and bulk density. To address these issues, biochar can be granulated with fertilizers, making it compatible with standard agricultural machinery. This study compared the effectiveness of granulated biochar-based fertilizers (gBBF) with the traditional method of co-applying biochar and mineral fertilizer.

In a greenhouse pot trial with white cabbage, both gBBF and co-applied biochar treatments were tested against a control mineral fertilizer. Some pots were subjected to simulated heavy rain to evaluate nutrient leaching. Without leaching, biochar did not significantly boost crop yields compared to the control. However, with leaching, both gBBF and co-applied biochar increased cabbage yields by 14% and 34%, respectively. Biochar amendments also reduced nitrogen leaching by 26-35%, and decreased the leaching of potassium, magnesium, and sulfur.

Despite its advantages, gBBF did not outperform co-applied biochar in biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More yield, partly due to reduced nutrient availability from the granulation process. Nevertheless, the improved mechanized application of gBBF could facilitate broader adoption of biochar in agriculture, highlighting the need for further research to optimize biochar formulations and application methods. The findings suggest that while gBBF can effectively reduce nutrient leaching and support crop growth under adverse conditions, traditional co-application methods may still offer superior benefits for biomass yield.